Why a new vaginal ring could be a game-changer in HIV prevention

Thesla Palanee-Phillips, University of the Witwatersrand
The results of the two studies showing that a vaginal ring can help reduce the risk HIV infection among women is being hailed as an important HIV prevention breakthrough.

Launched four years ago, the two clinical trials, known as ASPIRE and The Ring Study, set out to determine how safe and effective the ring was in prevention of HIV infection in women. The ring, which is used for a month at a time, contains an antiretroviral drug called dapivirine that acts by blocking HIV from multiplying.

The studies enrolled close to 4500 women aged 18 to 45 in South Africa, Uganda, Malawi and Zimbabwe. Each study found that the ring helps reduce the risk of HIV infection in women. In ASPIRE, the ring reduced the risk of HIV infection by 27% overall. In The Ring Study, infections were reduced by 31% overall.

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